I also just came across this.It is neat, reasonably concise, and nice that the video delay is reduced.The instructions are a bit over explained with pictures of the terminal window that are barely legible and don't really add much. However, to understand how simple these instructions are, one must have a working knowledge of the Linux command line. If one is lacking such knowledge, explaining that is way beyond the scope of this instructable.I have not yet tried putting this together. However, as for audio, i doubt it, since the Pi camera does not produce audio and incorporating audio from another source would add complications and additional CPU overhead. As for a USB camera, since the USB port and the Eithernet port use the same interface chip it might overload it. It would also add C...

I also just came across this.It is neat, reasonably concise, and nice that the video delay is reduced.The instructions are a bit over explained with pictures of the terminal window that are barely legible and don't really add much. However, to understand how simple these instructions are, one must have a working knowledge of the Linux command line. If one is lacking such knowledge, explaining that is way beyond the scope of this instructable.I have not yet tried putting this together. However, as for audio, i doubt it, since the Pi camera does not produce audio and incorporating audio from another source would add complications and additional CPU overhead. As for a USB camera, since the USB port and the Eithernet port use the same interface chip it might overload it. It would also add CPU usage since the onboard Pi video processing would not be used, and it (superficially) seems like this package is designed for the Pi camera. These are just guesses, more information would be available at: https://www.linux-projects.org/uv4l/ The User space Video 4 Linux page, the source of the modules.

sudo apt-get install motionmotion detection, detection zones, email, live streaming, time-lapse, etc.It works best with the Pi camera using the mmal motion variant, see here:https://www.raspberrypi.org/forums/viewtopic.php?t=18314